Justus A. W. Horstman
Engineers at Paintbrush Trl, Boulder, CO

License number
Colorado 15653
Issued Date
Aug 1, 1978
Renew Date
Jul 1, 2000
Expiration Date
Jul 1, 2000
Type
Professional Engineer
Address
Address
7276 Paint Brush Trl, Boulder, CO 80301

Professional information

Justus W. Photo 1

Leader Block For Storage Tape Media

US Patent:
5326045, Jul 5, 1994
Filed:
Apr 20, 1993
Appl. No.:
8/050506
Inventors:
Michael V. Konshak - Louisville CO
Justus A. W. Horstman - Boulder CO
Assignee:
Storage Technology Corporation - Louisville CO
International Classification:
G03B 102
US Classification:
242358
Abstract:
A leader block is provided for connection to a free end of storage tape media. The leader block includes a main body and a clamp member. The main body and clamp member define a space for receiving the free end of the storage tape media. A punch member is joined to the clamp member. The main body, the clamp member and the punch member are parts of a single, integral device that is preferably made by molding. After the storage tape media is inserted into the receiving space between the main body and the clamp member, the clamp member is caused to move relative to the main body by applying sufficient, predetermined shear forces. The punch member is also caused to move relative to the clamp member. The storage tape media is sandwiched between the main body and the clamp member using forces provided by the punch member and clamping forces caused by the main body and the clamp member.


Justus W. Photo 2

Take-Up Reel Assembly Having Radii At Discontinuities To Minimize Tape Impressions

US Patent:
5431356, Jul 11, 1995
Filed:
Sep 3, 1993
Appl. No.:
8/115751
Inventors:
Justus A. W. Horstman - Boulder CO
Michael V. Konshak - Louisville CO
Assignee:
Storage Technology Corporation - Louisville CO
International Classification:
G11B 2304
US Classification:
2423482
Abstract:
A take-up reel assembly for use with a single-reel tape cartridge in a cartridge-based tape transport includes a take-up reel and a leader block. The take-up reel includes an annular hub having an axis of rotation and a radial surface adapted to have the tape wound thereon. A radial slot in the hub extends from the radial surface towards the axis of rotation. The leader block is configured for attachment to a free end of a length of tape in the tape cartridge. The leader block has a shape substantially the same as the shape of the radial slot in the hub of the take-up reel. The leader block has a first end adapted for coupling with a threading post and a second end having an end surface with a radius of curvature substantially the same as the radius of curvature of the radial surface of the hub so that when the leader block is pulled into the slot by a loading post, first and second leader block edges of the end surface substantially mate with first and second hub edges of the radial surface to cover the slot. The first and second leader block edges and the first and second hub edges are radiused to substantially eliminate tape damage caused by impressioning.


Justus W. Photo 3

Shear Clamping Method

US Patent:
5551139, Sep 3, 1996
Filed:
May 23, 1994
Appl. No.:
8/247568
Inventors:
Michael V. Konshak - Louisville CO
Justus A. W. Horstman - Boulder CO
Assignee:
Storage Technology Corporation - Louisville CO
International Classification:
B23P 1904, G03B 140
US Classification:
294322
Abstract:
A leader block is provided for connection to a free end of storage tape media. The leader block includes a main body and a clamp member. The main body and clamp member define a space for receiving the free end of the storage tape media. A punch member is joined to the clamp member. The main body, the clamp member and the punch member are parts of a single, integral device that is preferably made by molding. After the storage tape media is inserted into the receiving space between the main body and the clamp member, the clamp member is caused to move relative to the main body by applying sufficient, predetermined shear forces. The punch member is also caused to move relative to the clamp member. The storage tape media is sandwiched between the main body and the clamp member using forces provided by the punch member and clamping forces caused by the main body and the clamp member.